實作 Excel 匯出匯入題目管理

app/api/questions/export/route.ts

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+import { NextRequest, NextResponse } from "next/server"
+import { getAllLogicQuestions } from "@/lib/database/models/logic_question"
+import { getAllCreativeQuestions } from "@/lib/database/models/creative_question"
+
+export async function GET(request: NextRequest) {
+  try {
+    const { searchParams } = new URL(request.url)
+    const type = searchParams.get("type") as "logic" | "creative"
+
+    if (!type) {
+      return NextResponse.json(
+        { success: false, message: "缺少題目類型參數" },
+        { status: 400 }
+      )
+    }
+
+    if (type === "logic") {
+      const questions = await getAllLogicQuestions()
+      
+      // 生成 CSV 格式的資料
+      const headers = [
+        "題目ID",
+        "題目內容", 
+        "選項A",
+        "選項B", 
+        "選項C",
+        "選項D",
+        "選項E",
+        "正確答案",
+        "解釋"
+      ]
+
+      const data = questions.map(q => [
+        q.id,
+        q.question,
+        q.option_a,
+        q.option_b,
+        q.option_c,
+        q.option_d,
+        q.option_e || "",
+        q.correct_answer,
+        q.explanation
+      ])
+
+      // 轉換為 CSV 格式
+      const csvRows = [headers, ...data].map(row => 
+        row.map(cell => {
+          const escaped = String(cell).replace(/"/g, '""')
+          return `"${escaped}"`
+        }).join(",")
+      )
+      
+      const csvContent = csvRows.join("\n")
+      
+      // 直接使用 UTF-8 BOM 字節
+      const bomBytes = new Uint8Array([0xEF, 0xBB, 0xBF]) // UTF-8 BOM
+      const contentBytes = new TextEncoder().encode(csvContent)
+      const result = new Uint8Array(bomBytes.length + contentBytes.length)
+      result.set(bomBytes)
+      result.set(contentBytes, bomBytes.length)
+      
+      const base64Content = Buffer.from(result).toString('base64')
+
+      return new NextResponse(JSON.stringify({
+        success: true,
+        data: base64Content,
+        filename: "邏輯思維題目範本.csv",
+        contentType: "text/csv; charset=utf-8"
+      }), {
+        headers: {
+          "Content-Type": "application/json"
+        }
+      })
+
+    } else {
+      const questions = await getAllCreativeQuestions()
+      
+      // 生成 CSV 格式的資料
+      const headers = [
+        "題目ID",
+        "陳述內容",
+        "類別",
+        "反向計分"
+      ]
+
+      const data = questions.map(q => [
+        q.id,
+        q.statement,
+        q.category,
+        q.is_reverse ? "是" : "否"
+      ])
+
+      // 轉換為 CSV 格式
+      const csvRows = [headers, ...data].map(row => 
+        row.map(cell => {
+          const escaped = String(cell).replace(/"/g, '""')
+          return `"${escaped}"`
+        }).join(",")
+      )
+      
+      const csvContent = csvRows.join("\n")
+      
+      // 直接使用 UTF-8 BOM 字節
+      const bomBytes = new Uint8Array([0xEF, 0xBB, 0xBF]) // UTF-8 BOM
+      const contentBytes = new TextEncoder().encode(csvContent)
+      const result = new Uint8Array(bomBytes.length + contentBytes.length)
+      result.set(bomBytes)
+      result.set(contentBytes, bomBytes.length)
+      
+      const base64Content = Buffer.from(result).toString('base64')
+
+      return new NextResponse(JSON.stringify({
+        success: true,
+        data: base64Content,
+        filename: "創意能力題目範本.csv",
+        contentType: "text/csv; charset=utf-8"
+      }), {
+        headers: {
+          "Content-Type": "application/json"
+        }
+      })
+    }
+
+  } catch (error) {
+    console.error("匯出題目失敗:", error)
+    console.error("錯誤詳情:", error instanceof Error ? error.message : String(error))
+    console.error("錯誤堆疊:", error instanceof Error ? error.stack : "無堆疊資訊")
+    return NextResponse.json(
+      { success: false, message: "匯出失敗", error: error instanceof Error ? error.message : String(error) },
+      { status: 500 }
+    )
+  }
+}